php设计模式之策略模式实例代码

html

<html>
<head>
    <meta charset="UTF-8">
    <title>简单计算器</title>
</head>
<body>

<h1>简单计算器</h1>
    <form action="10.php" method="post">
        <input type="text" name="v1" id="">
        <select name="op" id="">
            <option value="add">+</option>
            <option value="reduce">-</option>
            <option value="multi">*</option>
            <option value="div">/</option>
        </select>
        <input type="text" name="v2" id="">
        <button type="submit">结果</button>
    </form>
</body>
</html>

php

<?php 
header("Content-type:text/html;charset=utf-8");

interface math{
    function cal($v1, $v2);
}

class mathadd implements math
{
    public function cal($v1, $v2){
        return $v1 + $v2;
    }
}

class mathreduce implements math
{
    public function cal($v1, $v2){
        return $v1 - $v2;
    }
}

class mathmulti implements math
{
    public function cal($v1, $v2){
        return $v1 * $v2;
    }
}

class mathdiv implements math
{
    public function cal($v1, $v2){
        return $v1 / $v2;
    }
}

/**
* 
*/
class Cmath 
{
    protected $type;
    protected $calc = null;
    function __construct($type)
    {
        $this->type = $type;
        $cal = 'math'.$type;
        $this->calc = new $cal();

    }
    public function cal($v1, $v2){
        return $this->calc->cal($v1, $v2);
    }

}

$op = $_POST['op'];
$cal = new Cmath($op);
echo $cal->cal($_POST['v1'], $_POST['v2']);
posted @ 2020-01-12 12:46  A毛毛  阅读(218)  评论(0)  编辑  收藏  举报